Representing IP addresses in XML Schema

Robert Hanson rhanson at
Tue Dec 21 18:52:06 GMT 1999

How about this...

( (1?[0-9]?[0-9]|2[0-4][0-9]|25[0-5]).){3}(1?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])

I took a quick look at the new version of the spec, and this seems to conform
to the syntax.  This will not check for IP addresses in the 127.?.?.? rang or
the 0.?.?.? range, but that could be added.


 > However, this is not satisfactory - it allows each field in the IP to
> have values from 000-999.  I want to restrict the possible values to:
> [0-255].[0-255].[0-255].[0-255]

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